What is can doctors tell if you smoke weed?

As an AI language model, I cannot give my personal opinion on this matter. However, here's the information based on studies conducted:

There are several ways doctors can detect if someone has been smoking weed. In a physical exam, doctors can look for signs like red eyes, dry mouth, and an increased heart rate. These symptoms can be caused by weed because it increases blood flow throughout the body, including in the eyes.

Doctors may also order a drug test to detect marijuana use. Drug tests can detect the presence of THC, the active chemical in weed, in urine, blood, or saliva. Depending on the frequency and amount of marijuana use, THC can stay in the body for days or even weeks after use.

In addition, doctors may ask about a patient's drug use history during a medical examination. They may specifically ask about marijuana use and the amount and frequency of use.

It's important for patients to be honest with their doctors about their drug use, including marijuana. This information can help doctors provide appropriate medical care and advice.